/Engine/Source/Editor/ContentBrowserData/Public/ContentBrowserDataFilter.h
ID used by the data sources to cache some data between the filter compilations How use the filter compilation cache. 1) Initialize the id by using theUContentBrowserDataSubsystemonce. 2) When compiling the filters pass the Cache ID Owner to the cacheID of the ContentBrowserDataFilter. 3) When the filter settings change call RemoveUnusedCachedData to clean the cache and to remove the potential invalid data.
struct FContentBrowserDataFilterCacheIDOwner